Table 2.
Overview of the mosaicing data set.
| Pointing offset w.r.t | |||||
|---|---|---|---|---|---|
| Name | Date | # of exposures | Sgr A* (RA, Dec [mas]) | Preset sources | Anchor |
| S2 | 2021-05-29 & 30 | 13 | 24.8, 142.4 | S2 | S2 |
| NW | 2021-07-29 | 8 | −45.0, 45.0 | Sgr A*, S29, S55, S42 | S42 |
| SE | 2021-07-29 | 8 | 45.0, −45.0 | Sgr A*, S29, S55 | Sgr A* |
| mid | 2021-07-29 | 7 | −24.8, −31.4 | Sgr A*, S29, S55 | Sgr A* |
| S38 | 2021-07-25 & 26 | 8 | −38.6, −76.8 | S38 | S38 |
Notes. The second to last column lists all sources which are modeled as point sources with a Gaussian position prior. To break the translation invariance inherent to closure phases and visibility amplitudes, we fix the location of one bright point source, which we call the anchor for that image.
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